From: Joshua Ballanco <jballanc@gmail.com>
To: rack-devel@googlegroups.com
Subject: Re: Does Rack-servers block until the whole request body has been read?
Date: Mon, 25 Apr 2011 10:26:40 -0400 [thread overview]
Message-ID: <BANLkTine=djVphsjzZpqczKwYSor6o6UqA@mail.gmail.com> (raw)
In-Reply-To: <31236863.1318.1302679061651.JavaMail.geo-discussion-forums@yqlq3>
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Hi Daniel,
I faced this same issue when writing ControlTower. When a request gets
handed off to the application does depend on the server in question. Mongrel
waits for the entire body to be received first (even though it uses a
tempfile). Passenger, on the other hand, does not wait (at least, it didn't
the last time I tested it). Passenger also does not directly use a tempfile,
but rather a custom request body class. If you wanted to test directly, have
a look at Net::HTTP using body_stream (there seems to be some info you might
use here:
http://stackoverflow.com/questions/213613/buffered-multipart-form-posts-in-ruby
).
Cheers,
Josh
On Wed, Apr 13, 2011 at 3:17 AM, Daniel Abrahamsson <hamsson@gmail.com>wrote:
> Hi,
>
> I am working on a server that deals with large file uploads (currently
> built upon Rails, with a Metal taking care of the uploads). According to the
> rack-specification:
> "... handler developers must buffer the input data into some rewindable
> object if the underlying input stream is not rewindable".
>
> For Passenger and Mongrel, this means a temp file is created for the
> request (at least for requests as big as those I am dealing with).
>
> Now, my question is, does Rack wait until all data from the client has been
> read to a tempfile before passing on control to the Rack app (in this case,
> Rails)? Or does it pass on control directly, and block if the application
> reads data faster than the client is sending it?
>
> After some initial testing, it appears to me that the former is the case.
> Can anyone give me advice on how to test this? Perhaps it depends on the web
> server used? Perhaps on the framework?
>
> Thank you in advance for any advance or clarification on this matter.
>
> //Daniel
>
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next prev parent reply other threads:[~2011-04-25 14:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-13 7:17 Does Rack-servers block until the whole request body has been read? Daniel Abrahamsson
2011-04-25 14:26 ` Joshua Ballanco [this message]
2011-04-26 1:16 ` Eric Wong
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